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Old 10-25-2009, 01:42 PM   #1
Patrickclouds
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Bench Singlestage 300watts @ -40°C

I´ve built a rotary singlestage.

The components:
Compressor: 16,xx ccm Rotary
Condenser: large one with 4 x 120mm EBM-Papst fans
Expansion Valve: Capillary Tube 0,9mm 2,9m
Suction Line: DN8 1m
Evaporator: Iceman
Refrigerant: R404a
Hotgas 8mm
Liquid Line 6mm
Suction Line 10mm

300Watts @ -40°C to -41°C

Pics:

































































Last edited by Patrickclouds; 10-25-2009 at 01:44 PM.
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Old 10-25-2009, 01:50 PM   #2
tiborrr
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Totally awesome unit! Great temps for such a heat load!
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Old 10-25-2009, 03:05 PM   #3
Hampti
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Nice work. Really fine build.
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Old 10-26-2009, 01:10 AM   #4
tanguintel
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hey but is in a Ec unrockstar work shop ?!!
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Old 10-26-2009, 01:29 AM   #5
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Beautiful pipework
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Old 10-26-2009, 01:53 AM   #6
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good work patrick
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Old 10-26-2009, 01:58 AM   #7
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Very, very strong SS! Also, very clean work. Can't wait to see it doing work
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Old 10-26-2009, 05:05 AM   #8
Patrickclouds
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Thanks guys

@ tanguintel
You´re right. My oxygen was empty and I had to shorten the capillary tube so I took the unit to the company where Unrockstar works and asked his boss if I can use the brazing tool.
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Old 10-26-2009, 11:27 AM   #9
bazx
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beautifully done patrick

a pleasure to look at
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Old 10-26-2009, 11:35 AM   #10
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thats an awesome looking unit man

keep building it
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Old 10-26-2009, 01:14 PM   #11
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Looks Real Nice Can't Wait To See Some Numbers
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Old 10-26-2009, 01:14 PM   #12
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Really decent unit German precision
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Old 10-26-2009, 06:42 PM   #13
gosmeyer
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Very nice, Well done
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Old 10-27-2009, 06:08 AM   #14
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very nice temps and unit
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Old 10-27-2009, 03:44 PM   #15
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Why You've mounted condensor and fans in such, bit non standart way ?

Unit looks very good

Regards
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Old 10-27-2009, 03:54 PM   #16
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this mounting method reduces the high pressure. i´ve tested that on a small condenser in a water chiller, so i did it the same way on this unit.
i think that pushing / blowing the air through the condenser fins pushes the hot air better out of the condenser than the sucking mounting.
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Old 10-27-2009, 05:58 PM   #17
quintus
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You are right, you create positive presure on the condenser by pushing air thru, and negative by sucking. Offcourse the first is the best.
Isn't the desuperheater a litle too tight?
The insulation is lovely
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Old 10-28-2009, 04:00 AM   #18
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it´s not a desuperheater it´s more a vibration damper.

I think the condenser is big enough.
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Old 10-28-2009, 12:59 PM   #19
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I know that we misuse the desuperheater word around here, I was pointing out that the coils are so tight togheter
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Old 11-02-2009, 11:13 AM   #20
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wow nice work bro
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Old 11-06-2009, 01:41 AM   #21
Kamil Grzbiecik
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Great
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